How should the engineer respond if the stop arm fails to clear when attempting to pass a signal?

The proper response to a stop arm failing to clear when attempting to pass a signal is to immediately report it to the Trainmaster without taking any further action. In this scenario, the engineer must prioritize safety and adherence to protocol. Forcing the stop arm down can lead to damage or create a safety hazard, as it disregards established safety procedures and machinery operation guidelines. Ignoring the signal would be a violation of safety protocols and could lead to hazardous situations, such as colliding with oncoming traffic. Similarly, simply notifying the conductor without escalating the issue may not ensure that the necessary precautions are taken. By reporting the malfunction to the Trainmaster and not attempting to proceed, the engineer ensures that all safety measures are observed and that the issue can be addressed appropriately before any movement is made. This response underscores the importance of communication and following protocols in railway operations to maintain safety and accountability.